MIT researchers unveil TONTOU attack bypassing Spectre defenses on Intel/AMD CPUs

Researchers at MIT have developed a new side-channel attack called TONTOU that can bypass existing Spectre defenses on Intel and AMD processors. This attack exploits timer interrupts to reopen a window for branch predictor poisoning, allowing for data leakage. A proof-of-concept exploit targeting AMD's Zen 2 architecture has been successfully demonstrated. AI

IMPACT Potential for new hardware-level vulnerabilities impacting AI model security and performance.

RANK_REASON Academic research paper detailing a new security vulnerability and exploit. [lever_c_demoted from research: ic=1 ai=0.7]

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• AMD
• Intel
• MIT
• Spectre
• Zen 2

• safety
• infra

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